<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        .main {
            width: 300px;
            height: 300px;
            background-color: #999999;
            display: grid;
            grid-template-columns: 1fr 1fr 1fr;
            grid-template-rows:  1fr 1fr 1fr;
            grid-template-areas:
            "a1 a1 a2"
            "a1 a1 a2"
            "a3 a3 a3";
            /*grid-column-gap: 20px;*/
            /*grid-row-gap: 20px;*/
            /*row-gap: 20px;*/
            /*column-gap: 30px;*/

            gap: 20px 130px;
        }

        .main div {
            background-color: skyblue;
            border: 1px solid #000000;
            box-sizing: border-box;
        }

        .main div:nth-of-type(1){
            grid-area: a1;
        }

        .main div:nth-of-type(2){
            grid-area: a2;
        }

        .main div:nth-of-type(3){
            grid-area: a3;
        }


    </style>
</head>
<body>
<div class="main">
    <div class="a1">1</div>
    <div class="a2">2</div>
    <div class="a3">3</div>
</div>
</body>
</html>
